I think about such things a lot now, especially when I do minor physical things and usually pay for them the next morning with all kinds of minor pain. Despite my attempts to stay relative active on a daily basis. So this is old age, eh?
Though in my own case I've avoided having to have any surgery or broken any bones. But time will tell as to whether or not this changes, or that it may be inevitable. Definitely not for sissies.
Though what concerns me most is simply to have been an eyewitness in being my mother's caregiver in the last four years of her life. Tough to watch someone slowly fall apart and know that it could be me as well. Though I will have no one to care for me in such circumstances.
@Judge - If that happens, just PM me and I'll come take care of you. Assuming I can still walk and talk by then.